
Tungsten oxide may be applied for producing window heat insulation film so that this type of thin film will has the characteristics of high heat insulation, high visible light transmittance, anti-glare, anti-radiation, stain resistance, anti-aging, self-cleaning and privacy protection. The tungsten oxide powder may be prepared by thermal decomposition method. Preparation of Tungsten Oxide by Thermal Decomposition Method The tungsten trioxide (WO3) is dissolved in aqueous ammonia, and citric acid is added as a shape control agent, and therefore tungsten…